darkcomet | b2033ef6c4b6f6b580c24092bd483c80caae2d6efb658318a596db082d81427b

Analysis

max time kernel
149s
max time network
17s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
23/07/2024, 01:41

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General

Target
b2033ef6c4b6f6b580c24092bd483c80caae2d6efb658318a596db082d81427b.exe
Size 3.8MB
Sample240723-b4jaqa1bpr
SHA256 b2033ef6c4b6f6b580c24092bd483c80caae2d6efb658318a596db082d81427b
MD5 6ee7644aad712e9299421bda9d6ca7ad
SHA1 dec188b06083094dcdb33ea292b1e9695e367734
SHA512 61977d03965278ddcd7016d4ba7eda1011dca090ecb22297809c082428f98430ba04d513e341a6ab76671f315974955244705b75609cb68dd5489bbeba79cfe2
SSDEEP 98304:ki4hTLOMtHDMlANqnfVGPyhcMYg4lSiSLCQrdGLcjFjj/eWKS5h7EleIljztU/qu:ki4hTLOMtHDMlANqnfVGPyhcMYg4lSiQ
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

darkcomet persistence rat trojan upx

Malware Config

Signatures

Darkcomet
DarkComet is a remote access trojan (RAT) developed by Jean-Pierre Lesueur.
trojan rat darkcomet

Checks BIOS information in registry 2 TTPs 1 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	mcsft.exe

Executes dropped EXE 2 IoCs

pid	Process
2892	mcsft.exe
2004	mcsft.exe

Loads dropped DLL 6 IoCs

pid	Process
2024	b2033ef6c4b6f6b580c24092bd483c80caae2d6efb658318a596db082d81427b.exe
2024	b2033ef6c4b6f6b580c24092bd483c80caae2d6efb658318a596db082d81427b.exe
2024	b2033ef6c4b6f6b580c24092bd483c80caae2d6efb658318a596db082d81427b.exe
2024	b2033ef6c4b6f6b580c24092bd483c80caae2d6efb658318a596db082d81427b.exe
2024	b2033ef6c4b6f6b580c24092bd483c80caae2d6efb658318a596db082d81427b.exe
2892	mcsft.exe

UPX packed file 25 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/2004-51-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2004-50-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2004-48-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2004-52-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2004-54-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2004-53-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2004-55-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2004-58-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2004-57-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2004-56-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2004-59-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2004-60-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2004-61-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2004-62-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2004-63-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2004-64-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2004-65-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2004-66-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2004-67-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2004-68-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2004-69-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2004-70-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2004-71-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2004-72-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2004-73-0x0000000000400000-0x00000000004B5000-memory.dmp	upx

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1506706701-1246725540-2219210854-1000\Software\Microsoft\Windows\CurrentVersion\Run\Mcrosoft = "C:\\Users\\Admin\\AppData\\Roaming\\mcsft.exe"	reg.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2892 set thread context of 2004	2892	mcsft.exe	34

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 4 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	mcsft.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	mcsft.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	mcsft.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	mcsft.exe

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	mcsft.exe

Suspicious use of AdjustPrivilegeToken 23 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	2004	mcsft.exe
Token: SeSecurityPrivilege	2004	mcsft.exe
Token: SeTakeOwnershipPrivilege	2004	mcsft.exe
Token: SeLoadDriverPrivilege	2004	mcsft.exe
Token: SeSystemProfilePrivilege	2004	mcsft.exe
Token: SeSystemtimePrivilege	2004	mcsft.exe
Token: SeProfSingleProcessPrivilege	2004	mcsft.exe
Token: SeIncBasePriorityPrivilege	2004	mcsft.exe
Token: SeCreatePagefilePrivilege	2004	mcsft.exe
Token: SeBackupPrivilege	2004	mcsft.exe
Token: SeRestorePrivilege	2004	mcsft.exe
Token: SeShutdownPrivilege	2004	mcsft.exe
Token: SeDebugPrivilege	2004	mcsft.exe
Token: SeSystemEnvironmentPrivilege	2004	mcsft.exe
Token: SeChangeNotifyPrivilege	2004	mcsft.exe
Token: SeRemoteShutdownPrivilege	2004	mcsft.exe
Token: SeUndockPrivilege	2004	mcsft.exe
Token: SeManageVolumePrivilege	2004	mcsft.exe
Token: SeImpersonatePrivilege	2004	mcsft.exe
Token: SeCreateGlobalPrivilege	2004	mcsft.exe
Token: 33	2004	mcsft.exe
Token: 34	2004	mcsft.exe
Token: 35	2004	mcsft.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2024	b2033ef6c4b6f6b580c24092bd483c80caae2d6efb658318a596db082d81427b.exe
2892	mcsft.exe
2004	mcsft.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2024 wrote to memory of 1912	2024	b2033ef6c4b6f6b580c24092bd483c80caae2d6efb658318a596db082d81427b.exe	30
PID 2024 wrote to memory of 1912	2024	b2033ef6c4b6f6b580c24092bd483c80caae2d6efb658318a596db082d81427b.exe	30
PID 2024 wrote to memory of 1912	2024	b2033ef6c4b6f6b580c24092bd483c80caae2d6efb658318a596db082d81427b.exe	30
PID 2024 wrote to memory of 1912	2024	b2033ef6c4b6f6b580c24092bd483c80caae2d6efb658318a596db082d81427b.exe	30
PID 1912 wrote to memory of 2904	1912	cmd.exe	32
PID 1912 wrote to memory of 2904	1912	cmd.exe	32
PID 1912 wrote to memory of 2904	1912	cmd.exe	32
PID 1912 wrote to memory of 2904	1912	cmd.exe	32
PID 2024 wrote to memory of 2892	2024	b2033ef6c4b6f6b580c24092bd483c80caae2d6efb658318a596db082d81427b.exe	33
PID 2024 wrote to memory of 2892	2024	b2033ef6c4b6f6b580c24092bd483c80caae2d6efb658318a596db082d81427b.exe	33
PID 2024 wrote to memory of 2892	2024	b2033ef6c4b6f6b580c24092bd483c80caae2d6efb658318a596db082d81427b.exe	33
PID 2024 wrote to memory of 2892	2024	b2033ef6c4b6f6b580c24092bd483c80caae2d6efb658318a596db082d81427b.exe	33
PID 2892 wrote to memory of 2004	2892	mcsft.exe	34
PID 2892 wrote to memory of 2004	2892	mcsft.exe	34
PID 2892 wrote to memory of 2004	2892	mcsft.exe	34
PID 2892 wrote to memory of 2004	2892	mcsft.exe	34
PID 2892 wrote to memory of 2004	2892	mcsft.exe	34
PID 2892 wrote to memory of 2004	2892	mcsft.exe	34
PID 2892 wrote to memory of 2004	2892	mcsft.exe	34
PID 2892 wrote to memory of 2004	2892	mcsft.exe	34
PID 2892 wrote to memory of 2004	2892	mcsft.exe	34

C:\Users\Admin\AppData\Local\Temp\b2033ef6c4b6f6b580c24092bd483c80caae2d6efb658318a596db082d81427b.exe
"C:\Users\Admin\AppData\Local\Temp\b2033ef6c4b6f6b580c24092bd483c80caae2d6efb658318a596db082d81427b.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2024
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\EpSbN.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1912
- - C:\Windows\SysWOW64\reg.exe
    REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /v "Mcrosoft" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\mcsft.exe" /f
    3⤵
    - Adds Run key to start application
    PID:2904
- C:\Users\Admin\AppData\Roaming\mcsft.exe
  "C:\Users\Admin\AppData\Roaming\mcsft.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2892
- - C:\Users\Admin\AppData\Roaming\mcsft.exe
    C:\Users\Admin\AppData\Roaming\mcsft.exe
    3⤵
    - Checks BIOS information in registry
    - Executes dropped EXE
    - Checks processor information in registry
    - Enumerates system info in registry
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:2004

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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EpSbN.bat

Path C:\Users\Admin\AppData\Local\Temp\EpSbN.bat
Size 135B
SHA256 c98e20d46d6465febb5d29cfab51241521ea5d6cd621f5e18b9b7d6fbfac3f0f
MD5 a5feca573884d76f559b996d45e8ad9a
SHA1 0e81a993f3af4e31d60653dc2513186f0495f1c8
SHA512 a9239648b5f15eac4d4151b6e1bdc81065eeaeb101404c2a0126f03bc87f1e6a57206bfa07a44379e9d3bba889e4497a9991ff41fb109099b01512df3dc3cbda
MD5 SHA1 SHA512

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mcsft.exe

Path C:\Users\Admin\AppData\Roaming\mcsft.exe
Size 3.8MB
SHA256 23b76a26183a695188f5a992aa9a83c06265660949a64d5334c7ad8cb1e014fb
MD5 3a013036e8780cdfe62bedee0f45f492
SHA1 b929242e7c02fee00f5349382ef5eb1afce1478c
SHA512 2a3523c035040cac9a727aa3a9bf7ae3ff4709f6e0b42f748ed2b817cb651394ca432a6ab77b19653c5c9f530e2797335430ef26a23f940a1481d067e8c3a274
SSDEEP 98304:ki4hTLOMtHDMlANqnfVGPyhcMYg4lSiSLCQrdGLcjFjj/eWKS5h7EleIljztU/qm:ki4hTLOMtHDMlANqnfVGPyhcMYg4lSiY
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/2004-60-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2004-70-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2004-50-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2004-48-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2004-52-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2004-54-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2004-53-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2004-55-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2004-58-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2004-57-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2004-56-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2004-59-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2004-51-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2004-73-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2004-66-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2004-63-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2004-64-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2004-65-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2004-62-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2004-67-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2004-68-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2004-69-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2004-61-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2004-71-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2004-72-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2024-0-0x0000000000400000-0x00000000007C5000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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